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Finding the Fourth Proportional to 1,359.98, 2,039.90 and 744.88

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Solution

The fourth proportional to 1,359.98, 2,039.90 and 744.88 is: 1,117.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.98 : 2,039.90 = 744.88 : x
  2. Step 2: Convert to fraction form
    1,359.98/2,039.90 = 744.88/x
  3. Step 3: Cross multiply
    1,359.98x = 2,039.90 × 744.88
  4. Step 4: Simplify right side
    1,359.98x = 1,519,480.71
  5. Step 5: Solve for x
    x = 1,519,480.71/1,359.98
  6. Step 6: Final answer
    x = 1,117.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.